package com.mmall.common;

import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.map.annotate.JsonSerialize;

import java.io.Serializable;

/**
 * Created by wangshufu on 2017/7/27.
 */
@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL)
//表示在序列化中,如果哪个变量为null,就不进行序列化了
public class ServerResponse<T> implements Serializable{

    private int status;
    private String msg;
    private T data;

    private ServerResponse(int status){
        this.status = status;
    }
    public ServerResponse(int status,String msg){
        this.status = status;
        this.msg = msg;
    }
    private ServerResponse(int status,String msg,T data){
        this.status = status;
        this.msg = msg;
        this.data = data;
    }
    public ServerResponse(int status,T data){
        this.status = status;
        this.data = data;
    }

    @JsonIgnore
    //表示在序列化的时候,这个方法是不会被序列化的
    public boolean isSuccess(){
        return this.status == ResponseCode.SUCCESS.getCode();
    }
    @JsonIgnore
    //表示在序列化的时候,这个方法是不会被序列化的
    public boolean isError(){
        return this.status != ResponseCode.SUCCESS.getCode();
    }
    public int getStatus(){
        return this.status;
    }
    public String getMsg(){
        return this.msg;
    }
    public T getData(){
        return this.data;
    }

    /**
     * 通过success来创建一个成功的ServerResponse对象
     * @param <T> 第一个<T>表示该方法是一个泛型方法;ServerResponse<T>表示返回值是一个泛型
     * @return
     */
    public static <T> ServerResponse<T> createBySuccess(){
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode());
    }

    public static <T> ServerResponse<T> createBySuccessMessage(String msg){
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),msg);
    }

    public static <T> ServerResponse<T> createBySuccess(T data){
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),data);
    }

    public static <T> ServerResponse<T> createBySuccess(String msg,T data){
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(),msg,data);
    }

    public static <T> ServerResponse<T> createByError(){
        return new ServerResponse<T>(ResponseCode.ERROR.getCode(),ResponseCode.ERROR.getDesc());
    }
    public static <T> ServerResponse<T> createByError(String errorMessage){
        return new ServerResponse<T>(ResponseCode.ERROR.getCode(),errorMessage);
    }
    public static <T> ServerResponse<T> createByErrorCodeMessage(int errorCode,String errorMessage){
        return new ServerResponse<T>(errorCode,errorMessage);
    }
}
